Saw sharpening machine



April 2, 1935. A Q Q MAPES 1,996,163

sAw SHARPENING MACHINE Filed Spt. l, 19153 4 Sheets-Sheet l l 2z C. B. MAPBS.

@Hoz mm3 April 2, 1935.` C. B. MAPES 1,996,163

SAW SHARPENING MACHINE Filed Sept. 18, 1955 4 Sheets-Sheet 2 Granma April 2, 1935. c. B. MAPES SAW SHARPENING MACHINE Filed Sept. 18, 1933 4 Sheets-Sheet 3 2 3mm/141:01, C. B. MAPES.

@Hoz new April 2, 1935. c. E. MAPEs 9 SAW SHARPENING MACHINE Filed sept. 18 1933 4 Sheets-Sheet 4 @nvm/Lto@ C. B. MAPLS.

@Hoang Patented Apr. 2, 1935 a i Y 1,996,163;

, UNITED STATES; PAT-ENI clerics, A' ,Y "fraaissfff -Q Y f SAW snAnrENING MACHINE VChristian B. lllapes,lmahaa'Nein'.` Y Application .18, N f L y. i Y y zclaimaf (01....'165-34) My invention relates to machines'forsharp'en rearwardly -from the melanin.: andr a-i portion-25 ing saws. Itis the objectv of -rny inventionzto pro.- extending forwardly -therefrom.'f; The :rear `por@ vide a simple, `inexpensive and automaticaiiy lopf tion of the table has a:laterally.erftendingbear` erating-machine forsharpening'lsaws'adapted ing 2F :for'rthe horizontal mainfdrivefshaft 2T f for use with either circularl or straight'saws, and which extends transversely through 'the tarderA 5;

adaptable also for sharpeningr saws byriling or'. said shaft carrying'atone end1thereoffaldrve-l grinding, and forsWage-s-etting the teeth thereof. pulley 28', .and at the'other endcar'rying thecomef.`

More particular-objectsof my invention'areto' binedwcamand crank-diskwZS. .Atjonefside -of provide means -for holding the'saw to be sharp; andaxed tofthe hearing 126'. isra bearing .30 for l@ ened, and means for intermittently advancing the `a, short vertical shaff'tirl 'andsaid'shaftx isdrivenp: 10x holding means to present the teeth' .lof the'zvsaw Yfrom the:` 21, byimeansiof vsuitable'..spiral` successively to the sharpeningdevices; toprovide gears-.Mindosedmithinthehearmgs and :indicatreciprocating iileho1dingimeans=and means for-'f edvby'adotted'linesin Figz. "'Onthen'pper end? liftingv the reciprocatingfle-holding'means dur of .the fshaft '3 Iis mounted adiskhaving a dik ing the strokes thereof in one direction' and while. ametral-T-s1ot'3l1exhending vacross the upper face 15; the saw is advanced to presentanother'tooth thereofil L'Aboltilhas ahead portion'.disposed'v thereof in position for engagement with the file; slidabiy in rthe T-siotand isl 'provided Aat the 11p# to` provide a' grinding-wheel and meansV for per'endwith afwing-nut Whichisemployed .to erating the same 4in conjunctionv with the saw clamp the boltiat'adusted positions alongfthe' 2o'holdingand feeding vmeans; toprovidefa sa'v'vv-Ai slot,'whereby.thefboit.formsacrankpin ofwhich 20L tooth-swaging device and 'means `for` Aoperating the throw is yariableaccording to theradius of` l the same in 'coniunction with the sawholding" travellto which theboltis 'adjusted' .Alconnect-y and sharpening means; and tor providefnieans'" ing-.rod Slhels one end thereoffengaged pivotal-'2 foradjusting the saw-holding meansinirelation` 1y. with the 'adiustable crank-pin formed by the 251120 the sharpening devicesftoaccoimnodate saws L bolt .35; yand.itsfot'her.endissimilarlyengagedUV of different diameter or-width. and to vary the with 'anfaim 38 mounted towswing horizontally depth to which the saw-teeth will be engaged by'.4 ahorita,g vertical shaft' 39 mounted to rotate in 'a the sharpening devices. Y A bearingli on the.table-portion214r adjacent to A 1n the accomanying drawings, Fig.y 1 is a side the column 20. On saidv shaft 3$labove the swing# am?` elevation of la' machine embodying iny invention' ing ann is securedanotchedwheel 4l which 30 Fig. v2 isapartial side'viewof the same, showing is Vengaged by a-pawly 'on the ari-1138, whereby partsk in 4dil-erent oper-atingpositions.-'FigQ 33 is said wheeland .the shaft!! areinterrr'iittently'ac` a detaillongitiidinal vertical 'section ofltheswagl tuated *the swingingmovementsv of said ing device, the section being'fon the lineBQ-i VA`ofi arm. Acsecond pawl'l, 'mounted' on the' table 35.1 Fig. 5, Figi is adetailplan view oftheswaging 2l, engages the notched Wheel to `prevent reverse '3 5 '.1

device only," Fig. 5 is a partial planv view of the motion ftheoeof` :slidably the `Ver.. machine, Fig. 6 is a vertical transverse sectinon tical V-guides 12 of. the columnv 2Dl isf a .head-vv the line ofrFig. 5, Fig. 7 `is a side elevation of block il; which'is supportedvin' vertically "ad-V themachine as equipped I.for sharpening a -saw justed positions on' said guidesflcyV meansv of a 40s by grinding; Fig. 8 isa plan View of the same'Fig. screw .I5 extending through fthe foot-'plate #2111" 40 9 is a partial side elevation showing the cfrarrierv Upon.' headblck and veidaendng backV and feed devicesfor straight saws, Figi` 10 lis a through thezeolumn'lZU; is 'va-bearing dBi-forapartial front viewof the same, Fig. llis a detail horizontal shaftoi'- mandrel? All, which carries horizontal `section on'the linell-I Ivor' Fig. 10, onk its. rear lend?a'fwormqvheel18.v A worm I9,

Fig. A12 is a'de'tail 'endview of a. 'part of the meshing with-said'worm-wheeland shownonly 45 straight-saw carrier, and Fig. 13 isa partial lonby'dotted'lihes invFig. 111, is `held between lugs gitudinal sectionof the samel j' 53 iormedintegrally'with the bearing 46, and the Incarrying outmy invention according tothe' lower portion of 'the' shaft 39 npasses slidably' illustrated embodiment thereof, Iprovide a rigid thnoughfs'aid lugs VSiland the worm. 49, tll'eyshaitV 5o` frame comprising an open rectangular column 2t), i and wormrbeing connected byra -suitablejkeyfaf-f 5U l having a foot-plate 2l secured upon a suitable fixedto the worm axidtting "sld'ably inalongi-'f base 23, :and having on the edges at the front tudinalkeyway in the'fshaft.` Theffrontend ol.` side thereof verticaTV-guides 22.' On the upper the mandrel" islthreaded and Cprovidedwith' a" end of the column 20 is secured la horizontal -`topclamp-.nut 51, and,'in the use of the-machnerfor l member or table having .a `portion 2l .extendingr sharpeningeircular sawsythe'saWC is placed di- 55' rby varying the position of the crank-pinor bolt 35 in the T-slot 34 ofthe disk 33, whereby the stroke of the swinging arm 38 is varied, and the pawl 42 caused to advance the notched wheel 4| the required amount during the alternate strokes of the swinging arm. Resting slidably upon the front portion. 25;"0

the table, is a block 52 having at one side a longitudinal flange portion 53, and at the other side a. front lug 54 and a rear lug 55, said;flange portion and lugs straddling the table and tting slidably against the opposite-sides thereof. To`

the rearflug 55 ofthe sliding block is connected pivotally the front end of a connecting-rod 56, and vthev rear end of said rod: is: connected with a crank-pin 51 on the disk 29. Near the front end of the connecting-rod 56 isV an upwardly extending lug 58 having therein a threaded openextending longitudinally of the rod, and in said threaded opening is ydisposed va screwv 59 of whichthe frontend is adapted to engage the rear side of the lug 55 during a portion of the movement of the connecting-rod. Duringlrota..

tion of the drive-shaft'21 and crank-disk 29, thev connecting-rod 56 imparts longitudinal reciprocating movements to the block'52,and during the` rearward strokes of the block the same rests horizontally upon the table, while the crankpin 51r traverses the lower half of its` circular path. The screw 59 is so'adjusted that, at approximately Vthe moment the crank-pin 51 passes the rear dead-center, the end of said screw 59 engages the lug 55 and prevents further upward swinging movement of therod 56 relative to said lug.' In consequence thereof, during the ltravel of the crank-pin around the upperV portion of its circular path, the rear portionV of the block 52Y is lifted, as shownln Fig. 2, so that only the forward edge of said block rests upon the table during the forward stroke of the block. L At the conclusion of the forward stroke, or approximately as the crank-pin reaches the forward dead-center, the block 52 is lowered to its horizontal position, in .which it slides upon-the table during the rearward stroke. Actuation ofthe mandrel 41 bythe described feed devices is timed to occur during the forward strokes of the block52, whiley the rear portion thereof is lifted from-'the table. A screw 60 extends lhorizontally through the front lug 54 of the table, and the rear end of said` screw is hollowed to receive the pointed endof a iile 6|. .The *rearend `of the leis also pointed and enters a recess in the rear lug 55, in Vwhich it is held by longitudinal pressure from said screw 60.

'I'he file 6l is positioned to enter the notches be-` tween the teeth of the saw C as the same are pre-- sented Ysuccessively by the intermittent movements of the mandrel 41, the engagement of the file with the saw-teeth occurring during the rearward. strokes of the block 52, and the file being liftedfduring the forward strokes, as the saw is advanced to present thenext tooth in position for tiling. A pin or stud 62 is extended forward from the columniZlJ to engage the rear side of ther saw adjacent to the file and prevent chatter during the cuttingk strokes thereof, Vby ysupport-y ing the saw against the rearward pressure of the file thereon. Saws of different diameter are disposed in operative relation to the file by raising or lowering the mandrel head-block 44 by means of the adjusting-screw 45, the worm 49 sliding upon the vertical shaft 39 to afford a driving connection between said shaft and the mandrel at any position of the head-block.

In front portion 25 of the table, intermediate the .parts thereof traversed by the lugs 54 and 55 during reciprocation of the block 52, is a rectangular transverse channel 63 in which is slidably disposed the base of a tubular guide 64 for the swage-plunger 65, said guide being held in adjusted positions in said channel by screws 66 extending into the table through slots in said base. The plunger 65 is held normally in a raised position by means of a spring 61 disposed about the -same within the guide, the upper end of the plunger projecting above the guide, and the lower portion extending down through the table, which has a transverse slot therein of such length as to register with the plunger at any adjusted position ofthe guide. By suitable adjustments in the positionV of the guide the lower portion of the plunger is disposed in operative relation with the teeth of the saw C, or so that the swaging-groove in the end of the plunger is in register with the points of the saw-teeth during the pauses of the intermittent advance of the saw by the feed mechanism therefor. The plunger is actuated, to engage the saw-teeth and swageV or widen the points thereof transversely of the blade, by means of adrop-hammer formed by a weight 68 carried at the front end of a lever 69 which is pivoted on a -lug 10 extending up from the rear end of the table-portion 24. An intermediate portion of the lever 69 engages the spiral cam-face of the disk 29, whereby during the rotation of the driveshafty 21 the lever is intermittently raised as shown in Fig. 1, and then dropped so as to move by `gravity to the position shown by dotted lines in Fig. l, at which the weighted end or hammer 68forcibly engages the upper end of the swageplunger, the dropping of the hammer being timed, ofcourse, to occur while the saw is stationary, and sufficiently in advance of a feed-movement thereof to enable the hammer to be partially raised and the plunger disengaged from the sawtooth before an advance of the saw is commenced.

For use with saws which it is desirable to sharpen by grinding, the filing-block 52 and its connecting-rod 56 are removed from the machine, and the grinding device shown in Figs. 7 and 8 is substituted therefor. Said grinding device comprises an arm or lever 1I having its rear end connected pivotally with the lug 1U on the table, and having at its frontend a bearing 12 for an arbor 13 which carries a grinding-wheel 14 at one end and a grooved pulley 15 at the other end. On the pivoted end of the arm 1i is a platform 16 on which is mounted a small electric motor 11 having a pulley 18 from which a belt 19 is extended to the-pulley 15 on the arbor 13. The intermediate portion of the arm 1 I, above the disk 29, is connected with the crank-pin 51 by a short link or connecting-rod 80, whereby the arm 1I is 0scillated in a vertical plane about its pivoted rear end, during rotation of the main drive shaft 21.

The grinding-wheel 14 is positioned for engagement with the saw-teeth while the arm is in the lowered position, the wheel being driven continuously by the motor 11, and the periphery of the wheel being suitably formed to produce the desired shape of the teeth.

For use in sharpening straight saws, I provide n guide 8l and is movable longitudinally thereon by rotation of the mandrel 41 and said pinion 83. The rear portion of the slide is formed by an angle-bar having a vertical flange 85 engaging the rear sides of the rack-bar and the guide 8l, and a horizontal ange 86 extending rearward from the upper edge of said vertical flange and engaging slidably the front side of the columnrZ. The front portion of the slide is formed by an angle-bar having a vertical ange 81 engagingA the front sides of the rack-bar and guide, and a horizontal ilange 88 extending rearwardlyr above the flange 86 to similarly engage the column 20.

At each end of the slide, a spacing-block 89 is disposedabove the guideV 8l, between the vertical flanges 85 and 81 of the angle-bars, and secured to the latter by rivets 90. Said angesr85 and 81 are also connected by bolts 9| extending through longitudinal slots in the rack-bar 84, and the latter is held in longitudinally adjusted relations to the angle-bars by means of adjusting-screws 92 extending through the blocks 89 and engaging the ends of the rack-bar, as best shown in Fig; 13. The upper portion of the angle-bar flange 81 forms the rear member of a saw-clamp, the front clamp-member being formed by an angle-bar 93 which is secured to said flange 81 rby clamp-bolts v D Vhead-block carrying said 4saW-holderand movably mounted on the frame, adjusting means for 94 extending through the end Aportions of the bars. For sharpening a straight saw S, the blade thereof is inserted between the' clamp-members 81 and 93, with the toothed edge of the blade upwards and extending horizontally, and the clamp-bolts 94 are tightened to secure the saw xedly upon the slide. The position of the head,

block 44 is then adjusted by means of the'screw 45 to dispose the saw-teeth at the proper level for engagement with the le, or with the grinding-wheel if the same is employed in place of the le, and the screws 92 are employed if needed, to slightly vary the longitudinal relation of the rack-bar and slide, for disposing the saw-teeth in register with the sharpening means. The feed devices are adjusted as for use with circular saws, the intermittent rotational movements of the mandrel 41 being communicated by the pinion 83y to the rack-bar 84 by which the slide or carrier is successively advanced by amounts equal to the pitch of the saw-teeth.

Now, having. described my invention, what I claim and desire to secure by Letters Patent is:

l. In a saw sharpening machine, a main frame having vertical guide portions and horizontal guide portions, a saw-holder mounted slidably on said vertical guide portion of the frame, means. for retaining the saw-holder in vertically adjusted positions on said guide portion, a driveshaft, means including slidably connected parts` extending parallel with the .verticalguide and connecting fthe drive-shaft and saw-holder for actuating the latter intermittently, a le-holder slidable upon the horizontal guide portion of the frame and'straddling the same so as to be tiltable vvertically thereon, the file-holder' being adapted to hold a le in position for engaging a saw in the saw-holder, a crank connected with said drive-shaft, and a connecting-rod extending between said crank and le-holder and having a knee-joint connection with the latter, whereby the same is actuated reciprocatingly upon theV horizontal guide portion and lifted to a tilted position for disengaging the le from the saw during the strokes in one direction.

2. In a saw-sharpening machine, a fixed frame,

a drive-shaft'journaled therein, a reciprocating sharpening `means connected with said driveshaft for actuation thereby, a Ysaw-holder, a

moving said head-block to place the saw-holder in operative relation with the reciprocating lsharpening means, rotary feeding means connected with the saw-holder and carried by the f .head-block, and actuating means connecting said feeding means and the drive-shaft, said actuating means including slidably connected'members carried respectively by the frame and headblock.

' CHRISTIAN B. MAPES. 

